Issued Patents 2002
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6450050 | Walking beam balanced span and moment regulating economized oil pump and a stroke regulating device of the same | Renquan Luo, Changle Gao, Xiangyun Ji, Xuelu Zhang | 2002-09-17 |